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110-750.108. PATBNTEDAJAN..Q19,'1904.

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TOOL HOLDER.

APPLICATION FILED Ain. 11,1903. A

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` JIUNITED STATES Patented January 19, 1904."

PATENT OFFICE. Y

BENGT M. W. HANSON, OF HARTFORD, CONNECTICUT, ASSIGNOR TO PRATT AND WHITNEY COMPANY, OF HARTFORD, CONNECTICUT, A CORPORA- TIoN oF NEW JERSEY.

TOOL-HOLDER.

SPECIFICATION forming p art of Letters Patent No. 750,108, dated January 19, 1904. Application iiiled April 11, 1903. Serial No. 152,108. (No model.)

To allwhom it may concern:

Be it known that I, BENGT M. HANsoN, a citizen of Sweden, residing at Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Im-v provements in Tool-Holders,of which the following is a specication.

My invention relates to tool -holders for metal-working machines andto means for adjusting said holders so that the tool may be readily set at the required angle with relation to the work.

With the common kinds of tool-holders it is frequently necessary to reset the tool should it not be in proper position with relation to the axis of the Work, and this is usually done by adjusting the cutter vertically and horizontally in the slot of the tool-post and then securing it firmly in position.

My invention has for its object the provision of improved means for holding and adjusting the cutter so that should it be out/of its proper cutting position it can vbe readily brought to such position without the necessity of either loosening its securing-screw or other form of clamp.

A further object of the invention .is the provision of a rocking tool-post holder and of means for adjusting said holder and then securing it in position.

A further object of the invention is the provlsion of means for taking up wear or lost motion of the block upon which the tool-post is mounted.

Other objects 0f the invention will be hereinafter set forth.

In the accompanying drawings, FigureA 1 is a side elevation of a metal-turning lathe with my invention in place on the slide-rest thereof. Fig. 2 is a plan view of the invention. Fig. 3 is a side elevation. Fig. 4 is an end view of the slide to which my invention is applied. Fig. 5 is aside view of one of the adjustable gibs, and Fig. 6 is an end view of the crank for adjusting the tool-holder.

Like numerals designate similar parts throughout the several views.

Referring to the drawings, the numeral 5 designates thebed of a turning-lathe, 6 the head-stock, 7 thetail-st'ock, 8 the carriage, and 9 the slide-rest, thereof.- In the slide-rest is formed a transverse seat 10, concave in crosssection, and in the sides of said slide-restanti concentric with the seat are semicircular grooves 12 12, having inclined Walls 122 fora purpose hereinafter described. Fitted for rocking movement in the concave seat 10 is a .Y

jects from the inner side of one end of this arm, f

the end ofthe slide-rest 9, as shown in Fig. 2; and'said rib is received in the groove 12 in Designated by 16is an end plate of semicircular shape, said end plate having a curved i rib 17, inclined at 17 and adapted to fit the semicircular groove 12 in the side of the sliderest 9, as shown in Figs. 2 and 5. This end plate is pierced with holes 18 for the reception of screws `V19, (shown by dotted lines in Fig. 3,) said screws serving to secure it to the end of convex block 13 and is provided with lugs or pins 20 on its inner side, which enter corresponding recesses in the end of said block.

As will be seen from the drawings, the in# clined circumferential walls 15 17 are of reverse inclination to that of the walls 122 of end grooves 12 12', and in virtue of this construction should wear or lost motion occur it may readily be taken up by adjusting the screws 19, and thus forcing the inclined or wedge-like surfaces against each other. In this way the block 13 when set to its required position by means hereinafter described will be held firmly against movement or vibration when the tool is in action upon work in place between the centers of the lathe.

In the-face of convex block 13 is formed a transverse T-shaped groove 21 -for the reception of a similarly-formed foot 21 on the toolpost 22, and a likegroove 23 is formed in the end plate 16, so thatA the tool-post may be readily inserted in the groove 21 and be adjusted therein, as will be obvious. Surrounding the tool-post is a loose collar 24, and in the post is the usual slot for the reception of a tool 25, a screw, or it may be other clamp, 26 serving to secure the tool in position and the latter bearing againstthe collar and causing it to be clamped upon the top of the block, and thus rigidly fasten the tool-post in place,

Designated by 27 27 are separated lugs, in bearings of which is journaled a rock-shaft 28, having a handle 29 projecting between the lugs and a crank or wrist-pin 30 at its end, the latter being fitted in an opening in a split box 31, mounted for sliding movement in the slot 14' of arm 14, and by turning this shaft by means of its handle or in any other way the crank will cause the arm 14 to move in the required direction, and thus rock the block 13 in its seat until the tool 25 is brought to the desired adjusted position. By slotting the arm 14 in the manner described a fork is formed, said fork having yielding arms 142 143, between which the split block 31 is mounted, and by compressing these arms upon said block it will be rigidly clamped in position and will also be likewise compressed by the pressure of the arms upon the wrist-pin 30. For compressing these arms any desired means may be employed; but I have-shown for this purpose a capstan-screw 32, passing through the upper arm 142 and threaded into the lower one 143, as illustrated in Fig. 3, and by turning this screw by meansk of its handle 33 the arms may either be compressed upon the block or released therefrom, as desired.

Other means for compressing the arms may be substituted for the screw shown, and the block may be rocked by various devices without departure from the invention.

In the slide 9 is formed a dovetail groove 9' for fitting upon the usual guideway of the slide-rest, and for obtaining the transverse adjustment of this slide the common screw 34 may be employed, as shown in Fig. 1.

Journaled in bearings of the head-stock 6 is the usual live-spindle 35, carrying the stepped pulley, face-plate, center, &c., of well-known construction, and in the tail-stock 7 is mounted the ordinary center 36.

In the operation of my improvement the slide 9 is first adjusted to bring the tool into position with relation to the work, and if said tool should not be in the eXact central position required the screw 32 may be manipulated to release the pressure of the arms 142 143 upon the block 31, and then by turning the shaft 28 said block may be actuated to rock the arm 14 and block 13 until the tool is properly located, after which the screw 32 may be turned to again clamp the block 31 rigidly in place, and thus hold the parts firmly in their required positions.

Changes may be made in the form and proportions of the parts without departure from the invention, which is, furthermore, not limited to the exact devices shown and described,

Having thus described my invention, what I cla-im is" 1. rlfhe combination, with a support having a concave seat and end recesses, each having an inclined wall, of a tool-carrying block fitted in said seat; means for rocking said block; a rib having an inclined wall rigid with one end of the block, and fitting in one of said end recesses; a device carrying a rib with an inclined wall fitted in the other end recess; and means for adjusting one of said ribs to take up lost motion between the block and its support.

2. The combination, with a slide having a concave seat, of a tool-block having a convex surface fitting in said seat; an arm projecting from said tool-block, said arm being slotted; a block working in the slot of the arm; means for actuating said block; and means for securing the arm.

3. The combination, with a support, of a tool carrying block mounted for rocking movement on said support; a slotted arm rigid with said block; a shaft having a crank for actuating the arm; a boX in which the crank is fitted, said boX being in the slot of the arm; and means for' locking the arm.

4. The combination, with a support, of a tool carrying block mounted for rocking movement thereon; an arm having a bifurcated free end; a block fitted between the arms of the bifurcation; means for actuating said block thereby to adjust the tool-carrying block; and means for securing the tool-carrying block after it has been adjusted.

5. The combination, with a support, of a rocking tool-carrying block mounted thereon, said block being slotted; a tool-post having a post fitted in the slot of the block; a device bearing against one end of the support, said device having a slot through which the toolpost may be inserted into the slot of the block; and means for adjusting said device to take up lost motion of said block.

6. The combination, with a support having a concave recess and parti-circular grooves in the walls of said recess, said grooves each having an inclined surface, of a toolcarrying block fitting said concave recess; devices carried4 by the tool-block, and having inclined Walls fitting said grooves; and means for removably securing one of said devices to the end of the tool-carrying block.

7. The combination, with a support having a transverse, concave recess and parti-circular grooves with inclined walls in its sides, of a tool-carrying block fitted in said recess and having a parti-circular rib with an inclined surface; a plate having a parti-circular rib fitted in one of the grooves; and means for securing said plate to the end of the tool-carrying block.

8. In a tool-holder, the combination, with a support having a transverse, concave recess, of a tool-carrying block fitting said recess; a device rigid with said block and having' com- IOO IIO

pressible portions; a block movable between said compressibie portions; a rock-shaft having a wrist-pin iitted in the block mounted between the compressible portions of said device; means for actuating the rock-shaft; and means for clamping the compressible portions of the device upon the block in which. the wristpin is mounted.

9. The combination, with a support having a transverse, concave recess, of a tool-carrying block mounted in said recess; a tool-post adjustable in a groove of said block; an arm rigid with the block and having a slot in its i'reeend; a rock-'shaft having a wrist-pin; a compressible device mounted'in the slot in the free end of the armand adapted to receive said wrist-pin; and means for clamping the walls of the slot upon said compressible device. Y

10. In a tool-holder, the combination, with a vslide having a transverse, concave recess, and also having a pair of bearing-lugs; of a tool-carrying block mounted in said concave recess; an arm rigid with the tool-carrying a slide having a transverse, concave recess,

of a tool-carrying block having a convex under surface fitted 1n said recess; an arm rigid with the tool-carrying block and having a bifurcated free end; a rock-shaft having a wristpin; a split block mounted in the bifurcated end of the arm; and a screw for clamping the parts of said arm between which the split block is mounted upon said block.

In testimony whereof I aiiiX my signature in presence of two witnesses.

BENGT M. w. HANsoN.

Witnesses:

' H. E. BAILEY,

N. S. BATES. 

